Harry and Meghan share Archie's new milestones

Meghan Markle shared her son's milestone with military families during a surprise visit on Wednesday.

The six-month-old is ahead of schedule with this particular milestone, with most babies beginning to crawl between the ages of seven and 10 months. He also has two teeth.

The proud parents have shared the news of their son's milestone. (Getty)

The Duke and Duchess of Sussex visited military families in Windsor at the Broom Farm Community Centre, located in the army housing estate just a short drive from their home, Frogmore Cottage.

During the visit, Prince Harry, 35, and Meghan, 38, talked to fellow parents who spoke of the difficulties they face as partners travel to serve their country.

Amy Thompson, whose husband Brad is attached to the Welsh Guards, told reporters: "My daughter Aeris is the same age as Archie and we talked about weaning and the children beginning to crawl. [Meghan]'s just a normal mum and it was like talking to a friend."

The Duke and Duchess learned about the unique challenges of military life and the importance of social networks that exist to support families during deployments.

Archie has delighted royal fans during his first appearance in South Africa. (Getty)

Harry reportedly said: "I can't imagine what it's like to miss so much, as they change so quickly."